US Bridges

Falcon DR over Unknown Str

Fair

Linn County, Missouri · S 18 T 58 N R 20 W · Structure no. 19467

Built
1995
30 years old
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
35 ft
1 main span
Daily traffic
30
2024 count
Owner
County
County Highway Agency

About this bridge

Falcon DR over Unknown Str is a steel stringer/multi-beam or girder carrying Falcon DR over Unknown Str in Linn County, Missouri. It was built in 1995, so it is 30 years old, younger than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 30 vehicles a day, roughly 10% of them trucks, projected to reach 33 by 2044. The structure is 35 ft (10.7 m) long and 22 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesFalcon DR
CrossesUnknown Str
LocationS 18 T 58 N R 20 W
RouteCounty Highway 221
Coordinates39.84808, -93.17294
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.2 US tons
Inventory rating95.2 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length35 ft (10.7 m)
Longest span34 ft (10.4 m)
Deck width22 ft (6.6 m)
Roadway width21 ft (6.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2024)
Projected traffic33 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Falcon DR over Unknown Str built?

It was built in 1995, making it 30 years old in 2025.

What condition is Falcon DR over Unknown Str in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in November 2024.

How much traffic does Falcon DR over Unknown Str carry?

About 30 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Falcon DR over Unknown Str?

The structure is 35 ft (10.7 m) long with a longest span of 34 ft (10.4 m) and a deck 22 ft wide.

Who owns Falcon DR over Unknown Str?

It is owned by the County Highway Agency.